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|
use rustc_hir::def_id::DefId;
use rustc_index::vec::{Idx, IndexVec};
use crate::middle::exported_symbols::ExportedSymbol;
use crate::mir::Body;
use crate::ty::abstract_const::Node;
use crate::ty::{
self, Const, FnSig, GeneratorDiagnosticData, GenericPredicates, Predicate, TraitRef, Ty,
};
pub trait ParameterizedOverTcx: 'static {
#[allow(unused_lifetimes)]
type Value<'tcx>;
}
impl<T: ParameterizedOverTcx> ParameterizedOverTcx for &'static [T] {
type Value<'tcx> = &'tcx [T::Value<'tcx>];
}
impl<T: ParameterizedOverTcx> ParameterizedOverTcx for Option<T> {
type Value<'tcx> = Option<T::Value<'tcx>>;
}
impl<A: ParameterizedOverTcx, B: ParameterizedOverTcx> ParameterizedOverTcx for (A, B) {
type Value<'tcx> = (A::Value<'tcx>, B::Value<'tcx>);
}
impl<I: Idx + 'static, T: ParameterizedOverTcx> ParameterizedOverTcx for IndexVec<I, T> {
type Value<'tcx> = IndexVec<I, T::Value<'tcx>>;
}
impl<T: ParameterizedOverTcx> ParameterizedOverTcx for ty::Binder<'static, T> {
type Value<'tcx> = ty::Binder<'tcx, T::Value<'tcx>>;
}
#[macro_export]
macro_rules! trivially_parameterized_over_tcx {
($($ty:ty),+ $(,)?) => {
$(
impl $crate::ty::ParameterizedOverTcx for $ty {
#[allow(unused_lifetimes)]
type Value<'tcx> = $ty;
}
)*
}
}
trivially_parameterized_over_tcx! {
usize,
(),
u32,
std::string::String,
crate::metadata::ModChild,
crate::middle::codegen_fn_attrs::CodegenFnAttrs,
crate::middle::exported_symbols::SymbolExportInfo,
crate::mir::ConstQualifs,
ty::Generics,
ty::ImplPolarity,
ty::ReprOptions,
ty::TraitDef,
ty::Visibility,
ty::adjustment::CoerceUnsizedInfo,
ty::fast_reject::SimplifiedTypeGen<DefId>,
rustc_ast::Attribute,
rustc_ast::MacArgs,
rustc_attr::ConstStability,
rustc_attr::Deprecation,
rustc_attr::Stability,
rustc_hir::Constness,
rustc_hir::Defaultness,
rustc_hir::GeneratorKind,
rustc_hir::IsAsync,
rustc_hir::LangItem,
rustc_hir::def::DefKind,
rustc_hir::def_id::DefIndex,
rustc_hir::definitions::DefKey,
rustc_index::bit_set::FiniteBitSet<u32>,
rustc_session::cstore::ForeignModule,
rustc_session::cstore::LinkagePreference,
rustc_session::cstore::NativeLib,
rustc_span::DebuggerVisualizerFile,
rustc_span::ExpnData,
rustc_span::ExpnHash,
rustc_span::ExpnId,
rustc_span::SourceFile,
rustc_span::Span,
rustc_span::Symbol,
rustc_span::def_id::DefPathHash,
rustc_span::hygiene::SyntaxContextData,
rustc_span::symbol::Ident,
rustc_type_ir::Variance,
}
// HACK(compiler-errors): This macro rule can only take an ident,
// not a path, due to parsing ambiguity reasons. That means we gotta
// import all of these types above.
#[macro_export]
macro_rules! parameterized_over_tcx {
($($ident:ident),+ $(,)?) => {
$(
impl $crate::ty::ParameterizedOverTcx for $ident<'static> {
type Value<'tcx> = $ident<'tcx>;
}
)*
}
}
parameterized_over_tcx! {
Ty,
FnSig,
GenericPredicates,
TraitRef,
Const,
Predicate,
GeneratorDiagnosticData,
Body,
Node,
ExportedSymbol,
}
|
